Electric hammer.



B, VALIQUET. ELEOTRIO HAMMER. APPLIGATION FILED 11111.20, 1913.

Patented Mar. 24, 1914 [II/IIIIIIIIIIIIIIIIIIIIIII! dicated by the arrows.

BENJAMIN VALIQUEI, OF CHICAGO, ILLINOIS.

ELECTRIC HAMMER.

Specification of Letters Patent.

Patented Mar. 25 t, 1914?.

Application filed January 20, 1913. Serial No. 743,100.

To all whom it may c0nccr.--

Be it known that I, BENJAMIN V'ALI UET, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Electric Hammers, of which the following, when taken in connection with the drawing accompanying and forming a parthereof, is a specification.

This invention relates to hammers which zuc actuated by electric motors, usually, but at times by internal combustion motors, and whereof the motor actuating the device is built into the'frame or shell of the hammer.

The object of the invention is to obtain a device which will not be of any considerable weight. reference being had to the force of the blow delivered thereby, which will be sightly in appearance, and of a shapeor form which will not material; y obstruct the view of the object which receives the blow of the hammer thereof, which will be durable, not liable to get out of order or be broken, and a device whereof the operative parts will be well protected from dust, water, and dirt, as well as to protect the operator from injury by said operative parts.

Additional objects are disclosed by the claims and specification.

In the drawing Figure 1 is a top plan viewof a construction embodying this invention. Fig. 2 is a vertical section, on line 2--2 of Fig. 1,'viewed in the direction in- And F i 3 is a vertical section on line 3 -3 0 Fig. 1, viewed in the direction indicated by the arrows. Y

A reference letter applied to designate a given part indicates said part throughout V the several figures of the drawing, wherever the same appears.

A is the shell or casing of the device, and consists of parts a, a, which are joined together with base B interposed between them. by means of bolts 2). Part a of the shell or casing A is the base or frame for the hammer portion of the device, and base B is the foundation or frame of the-motor of the device. Part a! of the shell or casing may be of thin sheet metal, adapted to form a cover overthe motor.

C is the motor which actuates the hammer portion of the device. -I do not make any claim for invention in the motor of in bearings a, n.

I said passage way.

the device and any suitable motor may be used which is adapted to be installed on base B, as herein set forth. 4

D is a longitudinally movable hammer. The lower end of hammer D moves in "bean ing E. and said bearing is secured to the lower end of part a of the shell or casing A. The upper end of hammer D moves in bearing F, which is mounted on or forms anintegral part of base B.

.G is a hard metal end which is secured in the lower end of the hammer D. Hammer l) is provided witl slots H and I, between the ends thereof.

J is a shaft which is rotatably mounted in bearings j, j, in part a of shell A. Shaft J extends through slot H.

K is a cam which is mounted on shaft Hto be turned thereby. Cam K ispositioned in slots l. Rotation of shaft J turns cam K, and the turning of cam K moves the hammer D longitudinally.

worm engaging with said worm wheel.

N is a shaft which is rotatably .mounted Bearing n is in part a of case or shell A, and bearing 92, ison base B. lVorm M is rigidly secured on shaft N to he turned by the turning of said shaft.

0 is a beveled gear wheel secured on shaft N. and adapted to iutcrmesh with beveled gear P on the armature shaft of the motor (3. Rotation of the shaft of motor C produces rotation of shafts X and J, by means of the described gears and worm and gear.

Q is a well in hammer D, said well opening beneath the cam K, and Q is a longitudinally movable stem or piston in well Q.

R is a check valve, adapted to admit air through passage way S into well Q, and to prevent air flowing from said well through T is a spring in well Q adapted to force the stem 9 against the periphery of cam K.

In the'operation of the device the stem 9 in well Q is adapted to give opportunity for a recoil'of the hammer D from the object or thing struck thereby. To permit the recoil of the hammer D the slot]: is longer than is the diameter of-the cam K on :the

axial line of hammer D. when said cam is in' position to force the hammer to its extreme advanced position. The movement of the cam and hammer of the device is sutliciently rapid to give a throw'to the hammer beyond the position into which the cam would move it if the movement of said parts were not so rapid as to obtain the desired inertia'in said hammer, and said throw is to permit the of said hammer. To prevent a pound iamnier of the hammer D on the cam K, in. the recoilof said. hammer I provide the well Q and stem Q, as above described.

I claim g 1. A shell, a longitudinally movable hammer in, said shell, said hammer provided with slots therethrough, a shaft extending through one of said slots, said shaft rotatably journaled in said shell, a cam, said cam positioned in the other of said slots and adapted to move said hammer longitudinally, and said cam mounted on said shaft to turn therewith, a motor mounted in said shell and connections between said motor and said shaft to actuate said shaft by the movement of said motor.

2. A shell, a base adapted to form a transverse partition in said shell, an electric motor mounted on said base, a hammer mounted in said shell and adapted to move longitudinally with the end of said hammer projecting beyond said shell, and said hammer provided with slots therethrough, a shaft rotatably mounted in said shell to extend through one of said slots, a cam positioned in the remaining slot, said cam secured on said shaft to turn therewith, a Worm wheel on said shaft and attached thereto to turn therewith, an additional shaft rotatably mounted in said shell, a spiral worm and a beveled gear Wheel secured on said additional shaft to turn therewith, and a beveled gear wheel on the shaft of said motor adapted to intermesh with the beveled gear wheel on said additional shaft.

3. A two-part shell, a base Jada ted to form a transverse partition in said s ell interposed between the parts thereof, an electric motor mounted on said base and in one part of said shell, a hammer mounted in the other part of said shell and adapted to move longitudinally with one end of said hammer projecting beyond said shell, and said hammer provided with slots therethrough, a shaft rotatably mounted to extend through one of said slots, a cam positioned in the other one of said slots, said cam secured on said shaft to turn therewith, a worm wheel on said shaft and attached thereto to. turn therewith, an additional rotatably mounted shaft, a spiral Worm and a beveled gear secured on said additional shaft to turn therewithyzind a beveled gear wheel on the shaft of said motor adapted to intermesh with the beveled gear wheel on said additional shaft.

4. A shell, a longitudinally movable hammer mounted in said shell with one end of said hammer projecting b-yond said shell, said hammer provided with slots, a shaft extending through one of said slots and a cam positioned in the remaining slot, said cam rigidly secured to said shaft, a Well in said hammer and a stem in said well, the end of said stem adapted to come in contact withthe periphery of said cam, means to yieldiugly hold said stem against said cam, a motor in said shell, and a connection between said motor and said shaft to rotate said shaft on'the rotation of said motor.

BENJAMIN VALIQUET. 

